英语语法分析

The quadriceps muscle brings your knee into full extension.

四头肌肌肉让你的膝进入完全的延长。

Engage your quadriceps (front muscle on thigh) and extend your torso until you can melt over your legs.

使用你的四头肌(前面的大腿肌肉)并延长你的躯干直到你能够将你的腿弄软。

When an MRI revealed that I'd torn 90 percent of my right quadriceps, I was flown back to Washington.

核磁共振成像显示，我90%的右侧四头肌撕裂，于是我被飞机送回华盛顿。